Hi there.  New user here.  I am having trouble getting the double opt-in process to work.  I am working on a GoDaddy hosted WordPress site for a client.  I have tried using the GoDaddy SMTP option as well as external.  All test messages from the SMTP configuration page always arrive.
Regardless of how GoDaddy SMTP is configured, I always get the test mails.  No problems there.   I can also send a test newsletter successfully.  My problem is that activation emails (and subsequent confirmation emails, because I can’t activate) never arrive.  I have checked junk email, and still nothing.  The Newsletter Subscriber page shows the user and is waiting for confirmation.  If I use the “resend activation” button, it reports that an email is successfully sent, but again, nothing arrives.
If I manually confirm a subscriber (or if I just add a subscriber manually as a test user), I am able to successfully send a test activation email.  If I turn off double opt-in, the user is confirmed immediately, and again, everything works as expected.
Any insights would be highly appreciated!